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Cheap flights from Ontario to Missouri from C$ 278

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 16/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Missouri

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:20 a.m. - 2:05 p.m.
YYZ
-
STL
7h 45m
1 stop
American Airlines Logo
6:55 a.m. - 5:34 p.m.
STL
-
YYZ
9h 39m
1 stop
C$ 502American Airlines
Sat, 18 Jul - Tue, 21 Jul
American Airlines Logo
3:14 p.m. - 12:15 a.m.
YYZ
-
STL
10h 01m
1 stop
American Airlines Logo
9:32 a.m. - 6:30 p.m.
STL
-
YYZ
7h 58m
1 stop
C$ 514American Airlines
Sat, 25 Jul - Wed, 12 Aug
United Airlines Logo
3:10 p.m. - 9:51 p.m.
YOW
-
STL
7h 41m
1 stop
United Airlines Logo
1:08 p.m. - 9:56 p.m.
STL
-
YOW
7h 48m
2 stops
C$ 535United Airlines
Sat, 31 Oct - Wed, 4 Nov
United Airlines Logo
2:00 p.m. - 9:13 p.m.
YOW
-
STL
8h 13m
2 stops
United Airlines Logo
5:00 a.m. - 2:09 p.m.
STL
-
YOW
8h 09m
1 stop
C$ 536United Airlines
Tue, 27 Oct - Tue, 3 Nov
Air Canada Logo
10:05 a.m. - 3:26 p.m.
YOW
-
STL
6h 21m
1 stop
Air Canada Logo
4:05 p.m. - 1:40 a.m.
STL
-
YOW
8h 35m
1 stop
C$ 600Air Canada
Tue, 27 Oct - Fri, 30 Oct
Air Canada Logo
9:55 a.m. - 9:13 p.m.
YOW
-
STL
12h 18m
2 stops
Air Canada Logo
1:08 p.m. - 9:56 p.m.
STL
-
YOW
7h 48m
2 stops
C$ 619Air Canada
Sat, 31 Oct - Wed, 4 Nov
Delta Logo
7:00 a.m. - 4:29 p.m.
YUL
-
MCI
10h 29m
1 stop
Delta Logo
1:17 p.m. - 11:52 p.m.
MCI
-
YUL
9h 35m
1 stop
C$ 644Delta
Sat, 11 Jul - Sat, 18 Jul
Delta Logo
7:00 a.m. - 3:09 p.m.
YUL
-
MCI
9h 09m
1 stop
Delta Logo
8:10 a.m. - 5:38 p.m.
MCI
-
YUL
8h 28m
1 stop
C$ 677Delta
Tue, 8 Sep - Mon, 14 Sep
WestJet Logo
6:47 p.m. - 11:58 p.m.
YUL
-
MCI
6h 11m
1 stop
WestJet Logo
3:38 p.m. - 11:52 p.m.
MCI
-
YUL
7h 14m
1 stop
C$ 688WestJet
Mon, 27 Jul - Tue, 28 Jul
WestJet Logo
6:47 p.m. - 11:51 p.m.
YUL
-
MCI
6h 04m
1 stop
WestJet Logo
5:40 a.m. - 5:38 p.m.
MCI
-
YUL
10h 58m
1 stop
C$ 690WestJet
Thu, 17 Sep - Mon, 21 Sep

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Delta flights from Region of Ontario to Missouri

Our best Delta deals on Region of Ontario to Missouri flight tickets
Delta
11 Jul
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 29m
1 stop
MCI4:29 p.m.Kansas City
18 Jul
MCI1:17 p.m.Kansas City
9h 35m
1 stop
YUL11:52 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 644
Delta
11 Jul
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 29m
1 stop
MCI4:29 p.m.Kansas City
18 Jul
MCI1:17 p.m.Kansas City
9h 35m
1 stop
YUL11:52 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 646
Delta
21 Jul
YOW6:55 a.m.Ottawa
7h 10m
2 stops
STL1:05 p.m.Lambert-St Louis
25 Jul
STL6:30 a.m.Lambert-St Louis
10h 05m
2 stops
YOW5:35 p.m.Ottawa
C$ 664

WestJet flights from Region of Ontario to Missouri

Our best WestJet deals on Region of Ontario to Missouri flight tickets
WestJet
18 Aug
YYZ8:00 a.m.Toronto Pearson Intl
9h 44m
2 stops
STL4:44 p.m.Lambert-St Louis
21 Aug
STL8:48 a.m.Lambert-St Louis
11h 47m
2 stops
YYZ9:35 p.m.Toronto Pearson Intl
C$ 664
WestJet
27 Jul
YUL6:47 p.m.Montreal Pierre Elliott Trudeau Intl
6h 11m
1 stop
MCI11:58 p.m.Kansas City
28 Jul
MCI3:38 p.m.Kansas City
7h 14m
1 stop
YUL11:52 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 688
WestJet
17 Sep
YUL6:47 p.m.Montreal Pierre Elliott Trudeau Intl
6h 04m
1 stop
MCI11:51 p.m.Kansas City
21 Sep
MCI5:40 a.m.Kansas City
10h 58m
1 stop
YUL5:38 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 690

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 29 June 2026.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 18/7

7:20 a.m.-2:05 p.m.

1 stop7h 45m

Lambert-St Louis

Tue 21/7

6:55 a.m.-5:34 p.m.

1 stop9h 39m

C$ 502

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/7

3:14 p.m.-12:15 a.m.

1 stop10h 01m

Lambert-St Louis

Wed 12/8

9:32 a.m.-6:30 p.m.

1 stop7h 58m

C$ 514

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 31/10

3:10 p.m.-9:51 p.m.

1 stop7h 41m

Lambert-St Louis

Wed 4/11

1:08 p.m.-9:56 p.m.

2 stops7h 48m

C$ 535

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 27/10

2:00 p.m.-9:13 p.m.

2 stops8h 13m

Lambert-St Louis

Tue 3/11

5:00 a.m.-2:09 p.m.

1 stop8h 09m

C$ 536

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 27/10

10:05 a.m.-3:26 p.m.

1 stop6h 21m

Lambert-St Louis

Fri 30/10

4:05 p.m.-1:40 a.m.

1 stop8h 35m

C$ 600

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 31/10

9:55 a.m.-9:13 p.m.

2 stops12h 18m

Lambert-St Louis

Wed 4/11

1:08 p.m.-9:56 p.m.

2 stops7h 48m

C$ 619

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 11/7

7:00 a.m.-4:29 p.m.

1 stop10h 29m

Kansas City

Sat 18/7

1:17 p.m.-11:52 p.m.

1 stop9h 35m

C$ 644

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Tue 8/9

7:00 a.m.-3:09 p.m.

1 stop9h 09m

Kansas City

Mon 14/9

8:10 a.m.-5:38 p.m.

1 stop8h 28m

C$ 677
Quickest round-trip

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Mon 27/7

6:47 p.m.-11:58 p.m.

1 stop6h 11m

Kansas City

Tue 28/7

3:38 p.m.-11:52 p.m.

1 stop7h 14m

C$ 688

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Thu 17/9

6:47 p.m.-11:51 p.m.

1 stop6h 04m

Kansas City

Mon 21/9

5:40 a.m.-5:38 p.m.

1 stop10h 58m

C$ 690

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Missouri from

How to get the cheapest flight ticket from Region of Ontario to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Missouri?

The month of December is, on average, the cheapest month to fly to Missouri from Region of Ontario, with most prices found around C$ 238. If you are unable to visit Missouri during the month of December, then departing from Region of Ontario during the month October is also very affordable. Most momondo users find prices during this month for around C$ 248.

What is the cheapest day to depart on your flight to Missouri?

Our data shows that Saturday is the least expensive day to fly to Missouri. Tickets to fly out on this day can be as low as C$ 601. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 910. These prices are subject to change though, so be sure to set up a Price Alert for flights to Missouri.

What is the cheapest time of day to depart on your flight to Missouri?

Our data shows that the cheapest Region of Ontario to Missouri flights are usually those with departure times at noon. Our users have found flights to Missouri at noon for as low as C$ 642. In the evening is when there is more demand to fly to Missouri, so prices are often more expensive at around C$ 1,025 per ticket.

What is the cheapest Ontario to Missouri flight route?

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Ontario - Missouri flight prices

How far in advance should I book a flight from Ontario to Missouri?

You are more likely to see cheaper flights to Missouri from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around C$ 733 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Region of Ontario for as low as C$ 509 on momondo.

What cabin class options are available on Region of Ontario to Missouri flights?

There are 4 cabin classes available to choose from on Region of Ontario to Missouri flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Missouri flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Missouri.

Cheap Region of Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Missouri

Best price found

C$ 384

Fastest flight time

2h 05m

Direct flights

Every day

Airports in Missouri

55 airports
The best one-way flight to Missouri from Region of Ontario in the past 72 hours is C$ 384. The best round-trip flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is C$ 596.
The fastest flight from Region of Ontario to Missouri takes 2h 05m
Direct flights go from Region of Ontario to Missouri every day.
There are 55 airports in Missouri. From Region of Ontario there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Ontario to Missouri

  • When did momondo last update prices for flights from Ontario to Missouri?

    Prices for flights from Ontario to Missouri are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario to Missouri?

  • How old do you have to be to fly from Ontario to Missouri?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Missouri.

  • What documentation or ID do you need to fly to Missouri?

    The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Missouri?

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 341Free CancellationRating
7.1
11,271 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 347Free CancellationRating
7.4
9,895 reviews
Search United Airlines flights
American AirlinesPriceFrom C$ 375Free CancellationRating
7.1
11,766 reviews
Search American Airlines flights
DeltaPriceFrom C$ 571Free CancellationRating
7.8
8,450 reviews
Search Delta flights
WestJetPriceFrom C$ 638Free CancellationRating
7.2
3,388 reviews
Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Missouri?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Missouri from Ontario.

Can I find flights from Ontario to Missouri with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Missouri flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Missouri?

Once all potential Ontario to Missouri flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Missouri right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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